O. — Plan of the Plots in Hoos Field on which Potatoes were grown without 

 Manure, and with various Manures. 



26 years, 1876-1901. 



In 1902 and 1903 Barley, and in 1904 Oats, were sown, without manure, to determine 

 the duration of the residues of the previous manuring In 1905 and each year to 1911 

 Barley was sown, and in 1912 Oats, on Plots 1-4 without manure. Plots 5-10 sown with 

 Leguminous seeds each year to 1911, and Oats in 1912. 



Total area of ploughed land, about 2^^ acres. Area of each plot, \ acre. 

 The double lines indicate division paths between plot and plot. 



